Display Device Blood Pressure Measurement with Abnormal Segment Interpolation

Solution Overview

Problem

Conventional methods for measuring blood pressure using display devices are limited by inaccuracies due to inconsistent pressure application, leading to unreliable pulse wave signals.

Innovation Solution

A display device equipped with a pressure sensor and photosensor that identifies abnormal measurement segments, interpolates pulse wave signals, and calculates blood pressure based on both pressure and light reflection data, ensuring accurate blood pressure measurement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If pressure sensor and photosensor are used to measure blood pressure in a display device, then blood pressure measurement functionality is integrated into the display device, but measurement accuracy deteriorates due to inconsistent pressure application

Engineering Contradiction:

Improveblood pressure measurement functionalityVSAvoidblood pressure measurement accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system continuously monitors pressure signals during measurement segments and uses this feedback to identify abnormal segments where pressure was inconsistent. The identified abnormal segments are then excluded from the final blood pressure calculation, ensuring that only measurements taken with proper pressure are used.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The measurement process is divided into multiple measurement segments, allowing the system to evaluate pressure consistency for each segment individually. This segmentation enables selective use of only those segments that meet pressure criteria, improving overall measurement accuracy while maintaining the integrated functionality.

Inventive Principle:

Principle #1Segmentation

2Reliability

If multiple measurement segments are used to improve blood pressure measurement reliability, then measurement reliability is improved, but device complexity increases due to signal processing requirements

Engineering Contradiction:

Improveblood pressure measurement reliabilityVSAvoidsignal processing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The measurement process is divided into multiple measurement segments, allowing the system to evaluate pressure consistency for each segment individually. This segmentation enables selective use of only those segments that meet pressure criteria, improving overall measurement accuracy while maintaining the integrated functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system extracts and removes pulse wave signals from identified abnormal measurement segments before generating the final blood pressure calculation. This extraction approach eliminates the need for complex real-time correction algorithms, reducing processing complexity while maintaining reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

3Measurement precision

If abnormal measurement segments are identified and removed from pulse wave signal, then blood pressure calculation accuracy is improved, but loss of information occurs due to removal of measurement data

Engineering Contradiction:

Improveblood pressure calculation accuracyVSAvoidmeasurement data loss

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The system extracts and removes pulse wave signals from identified abnormal measurement segments before generating the final blood pressure calculation. This extraction approach eliminates the need for complex real-time correction algorithms, reducing processing complexity while maintaining reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system discards data from abnormal measurement segments that would compromise accuracy, but recovers sufficient information from valid segments to perform accurate blood pressure calculation. The method ensures that enough valid measurement data remains to maintain measurement reliability.

Inventive Principle:

Principle #34Discarding and recovering

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enhances the accuracy of blood pressure calculation by correcting for inconsistent pressure application and providing reliable blood pressure readings.

Implementation Method 1

pressure applied by a user is sensed with a pressure sensor

Methodology Applied

Scientific EffectPressure sensing:

Implementation Method 2

light reflected off a blood vessel of the user's finger or the like is sensed with a photosensor

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS20240041335A1Display device and method of measuring blood pressure using the same

Publication Date: 2024.02.08 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a display panel including a plurality of pixels, a pressure sensor configured to sense pressure applied from outside of the display device, a photosensor configured to detect light, and a processor configured to receive a pressure signal sensed by the pressure sensor in each of a plurality of measurement segments, and a first pulse wave signal sensed by the photosensor in each of the plurality of measurement segments. The processor is further configured to identify at least one of the measurement segments as an abnormal measurement segment, remove a pulse waveform from the first pulse wave signal in the abnormal measurement segment, generate a pulse wave signal by interpolating the pulse waveform, and calculate blood pressure based on the pulse wave signal.